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drawing.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* Screen drawing functions
*
* Copyright 1995-2000 Bernd Schmidt
* Copyright 1995 Alessandro Bissacco
* Copyright 2000-2025 Toni Wilen
*
* Complete rewrite 2024-2025
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include <ctype.h>
#include <assert.h>
#include "options.h"
#include "threaddep/thread.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "xwin.h"
#include "autoconf.h"
#include "gui.h"
#include "picasso96.h"
#include "drawing.h"
#include "savestate.h"
#include "statusline.h"
#include "inputdevice.h"
#include "debug.h"
#ifdef CD32
#include "cd32_fmv.h"
#endif
#ifdef WITH_SPECIALMONITORS
#include "specialmonitors.h"
#endif
#include "devices.h"
#include "gfxboard.h"
#define ENABLE_MULTITHREADED_DENISE 1
extern int multithread_enabled;
#define MULTITHREADED_DENISE (ENABLE_MULTITHREADED_DENISE && multithread_enabled != 0)
#define BLANK_COLOR 0x000000
#if 0
#define DEBUG_TVOVERSCAN_H_GRAYSCALE 0x22
#define DEBUG_TVOVERSCAN_V_GRAYSCALE 0x44
#define DEBUG_LOL_COLOR 0x006600
#else
#define DEBUG_TVOVERSCAN_H_GRAYSCALE 0x0
#define DEBUG_TVOVERSCAN_V_GRAYSCALE 0x0
#define DEBUG_LOL_COLOR 0x000000
#endif
#define AUTOSCALE_SPRITES 1
#define LOL_SHIFT_COLORS 0
#define GENLOCK_EXTRA_CLEAR 8
#define MAX_RGA_OVERLAPPING_CYCLES 5
uae_u8 *xlinebuffer, *xlinebuffer2;
uae_u8 *xlinebuffer_genlock;
static int *amiga2aspect_line_map, *native2amiga_line_map;
static int native2amiga_line_map_height;
static uae_u8 **row_map;
static uae_u8 *row_map_genlock_buffer;
static uae_u8 row_tmp8[MAX_PIXELS_PER_LINE * 32 / 8];
static uae_u8 row_tmp8g[MAX_PIXELS_PER_LINE * 32 / 8];
static int max_drawn_amiga_line;
uae_u8 **row_map_genlock;
uae_u8 *row_map_color_burst_buffer;
static uae_sem_t write_sem, read_sem;
struct denise_rga_queue
{
int type;
int vpos, linear_vpos;
int gfx_ypos;
nln_how how;
uae_u32 linecnt;
int startpos, endpos;
int total;
int skip;
int skip2;
int dtotal;
int calib_start;
int calib_len;
bool lol, lof;
int hdelay;
uae_u16 strobe;
int strobe_pos;
int erase;
struct linestate *ls;
uae_u16 reg, val;
};
static volatile uae_atomic rga_queue_read, rga_queue_write;
static int denise_thread_state;
static struct denise_rga_queue rga_queue[DENISE_RGA_SLOT_CHUNKS];
static struct denise_rga_queue temp_line;
static struct denise_rga_queue *this_line;
static volatile bool thread_debug_lock;
static void denise_handle_quick_strobe(uae_u16 strobe, int offset, int vpos);
static void draw_denise_vsync(int);
static void denise_update_reg(uae_u16 reg, uae_u16 v, int linecnt);
static void draw_denise_line(int gfx_ypos, nln_how how, uae_u32 linecnt, int startpos, int total, int skip, int skip2, int dtotal, int calib_start, int calib_len, bool lol, int hdelay, struct linestate *ls);
static void quick_denise_rga(int linecnt, int startpos, int endpos)
{
int pos = startpos;
endpos++;
endpos &= DENISE_RGA_SLOT_MASK;
while (pos != endpos) {
struct denise_rga *rd = &rga_denise[pos];
if (rd->line == linecnt && rd->rga != 0x1fe && (rd->rga < 0x38 || rd->rga >= 0x40)) {
denise_update_reg(rd->rga, rd->v, linecnt);
}
pos++;
pos &= DENISE_RGA_SLOT_MASK;
}
}
static void update_overlapped_cycles(int endpos)
{
for (int i = 0; i <= MAX_RGA_OVERLAPPING_CYCLES; i++) {
struct denise_rga *rga = &rga_denise[(endpos - i) & DENISE_RGA_SLOT_MASK];
rga->line++;
}
}
static void read_denise_line_queue(void)
{
bool nolock = false;
while (rga_queue_read == rga_queue_write) {
uae_sem_wait(&write_sem);
}
struct denise_rga_queue *q = &rga_queue[rga_queue_read & DENISE_RGA_SLOT_CHUNKS_MASK];
this_line = q;
bool next = false;
//evt_t t1 = read_processor_time();
#if 0
sleep_millis(1);
#endif
if (q->type == 0) {
draw_denise_line(q->gfx_ypos, q->how, q->linecnt, q->startpos, q->total, q->skip, q->skip2, q->dtotal, q->calib_start, q->calib_len, q->lol, q->hdelay, q->ls);
next = true;
} else if (q->type == 1) {
draw_denise_bitplane_line_fast(q->gfx_ypos, q->how, q->ls);
} else if (q->type == 2) {
draw_denise_border_line_fast(q->gfx_ypos, q->how, q->ls);
} else if (q->type == 3) {
quick_denise_rga(q->linecnt, q->startpos, q->endpos);
} else if (q->type == 4) {
denise_handle_quick_strobe(q->strobe, q->strobe_pos, q->vpos);
next = true;
} else if (q->type == 5) {
draw_denise_vsync(q->erase);
} else if (q->type == 6) {
denise_update_reg(q->reg, q->val, q->linecnt);
nolock = true;
}
if (!nolock) {
if (!thread_debug_lock) {
write_log("read_denise_line_queue: queue processed without lock!\n");
}
}
//evt_t t2 = read_processor_time();
//write_log("%lld ", (t2 - t1));
if (next) {
update_overlapped_cycles(q->endpos);
}
if (!nolock) {
if (!thread_debug_lock) {
write_log("read_denise_line_queue: queue lock was released during draw!\n");
}
}
#if 0
struct vidbuf_description *vidinfo = &adisplays[0].gfxvidinfo;
struct vidbuffer *vb = vidinfo->inbuffer;
if (!vb->locked || !vb->bufmem || row_map[0] == NULL) {
write_log("read_denise_line_queue: buffer cleared!\n");
}
for (int i = 0; i < vb->inheight; i++) {
uae_u8 *p = row_map[i];
*p = 0x12;
}
#endif
atomic_inc(&rga_queue_read);
uae_sem_post(&read_sem);
}
static void denise_thread(void *v)
{
denise_thread_state = 1;
while(denise_thread_state) {
read_denise_line_queue();
}
denise_thread_state = -1;
}
static bool denise_locked;
static bool denise_lock(void)
{
draw_denise_line_queue_flush();
if (denise_locked) {
return true;
}
int monid = 0;
struct amigadisplay *ad = &adisplays[monid];
struct vidbuf_description *vidinfo = &ad->gfxvidinfo;
struct vidbuffer *vb = &vidinfo->drawbuffer;
if (!vb->locked) {
if (!lockscr(vb, false, display_reset > 0)) {
notice_screen_contents_lost(monid);
return false;
}
}
denise_locked = true;
return true;
}
int scandoubled_line;
struct amigadisplay adisplays[MAX_AMIGADISPLAYS];
typedef enum
{
CMODE_NORMAL,
CMODE_DUALPF,
CMODE_EXTRAHB,
CMODE_HAM,
CMODE_EXTRAHB_ECS_KILLEHB
} CMODE_T;
static void select_lts(void);
static uae_u32 ham_lastcolor;
int debug_bpl_mask = 0xff, debug_bpl_mask_one;
/* mirror of chipset_mask */
bool ecs_agnus;
bool ecs_denise, ecs_denise_only;
bool aga_mode;
bool agnusa1000;
bool denisea1000_noehb;
bool denisea1000;
bool direct_rgb;
static int linedbl, linedbld;
int interlace_seen;
int detected_screen_resolution;
#define AUTO_LORES_FRAMES 10
static int can_use_lores = 0, frame_res, frame_res_lace;
static int resolution_count[RES_MAX + 1], lines_count;
static int center_reset;
static bool init_genlock_data;
bool need_genlock_data;
/* Lookup tables for dual playfields. The dblpf_*1 versions are for the case
that playfield 1 has the priority, dbplpf_*2 are used if playfield 2 has
priority. If we need an array for non-dual playfield mode, it has no number. */
/* The dbplpf_ms? arrays contain a shift value. plf_spritemask is initialized
to contain two 16 bit words, with the appropriate mask if pf1 is in the
foreground being at bit offset 0, the one used if pf2 is in front being at
offset 16. */
static int dblpf_ms1[256], dblpf_ms2[256], dblpf_ms[256];
static int dblpf_ind1[256], dblpf_ind2[256];
static int dblpf_2nd1[256], dblpf_2nd2[256];
static const int dblpfofs[] = { 0, 2, 4, 8, 16, 32, 64, 128 };
static int sprite_offs[256];
/* Video buffer description structure. Filled in by the graphics system
* dependent code. */
/* OCS/ECS color lookup table. */
xcolnr xcolors[4096];
static uae_u32 chunky_out[4096], dpf_chunky_out[4096];
#ifdef AGA
/* AGA mode color lookup tables */
unsigned int xredcolors[256], xgreencolors[256], xbluecolors[256];
static int dblpf_ind1_aga[256], dblpf_ind2_aga[256];
#else
static uae_u8 spriteagadpfpixels[1];
static int dblpf_ind1_aga[1], dblpf_ind2_aga[1];
#endif
int xredcolor_s, xredcolor_b, xredcolor_m;
int xgreencolor_s, xgreencolor_b, xgreencolor_m;
int xbluecolor_s, xbluecolor_b, xbluecolor_m;
xcolnr fullblack;
static struct color_entry direct_colors_for_drawing_bypass;
static xcolnr *p_acolors;
static xcolnr *p_xcolors;
static uae_u8 *refresh_indicator_buffer;
static uae_u8 *refresh_indicator_changed, *refresh_indicator_changed_prev;
static int refresh_indicator_height;
/* Centering variables. */
static int min_diwstart, max_diwstop;
/* The visible window: VISIBLE_LEFT_BORDER contains the left border of the visible
area, VISIBLE_RIGHT_BORDER the right border. These are in window coordinates. */
int visible_left_border, visible_right_border;
/* Pixels outside of visible_start and visible_stop are always black */
static int visible_left_start, visible_right_stop;
static int visible_top_start, visible_bottom_stop;
bool exthblanken;
static int exthblank;
static bool syncdebug;
static int linetoscr_x_adjust_pixbytes, linetoscr_x_adjust_pixels;
static int thisframe_y_adjust;
static int thisframe_y_adjust_real, min_ypos_for_screen;
static int max_ypos_thisframe1;
int thisframe_first_drawn_line, thisframe_last_drawn_line;
/* A frame counter that forces a redraw after at least one skipped frame in
interlace mode. */
static int last_redraw_point;
#define MAX_STOP 30000
static int first_drawn_line, last_drawn_line;
/* These are generated by the drawing code from the line_decisions array for
each line that needs to be drawn. These are basically extracted out of
bit fields in the hardware registers. */
static int bplmode, bplmode_new;
static bool bplehb_eke, bplham, bplehb, bpldualpf, bpldualpfpri;
static uae_u8 bplehb_mask;
static int bpldualpf2of, bplplanecnt, bplmaxplanecnt, ecsshres;
static int bplbypass, bplcolorburst, bplcolorburst_field;
static int bplres;
static int plf1pri, plf2pri, bpland;
static uae_u32 plf_sprite_mask;
static int sbasecol[2], sbasecol2[2];
static bool ecs_genlock_features_active;
static uae_u8 ecs_genlock_features_mask;
static bool ecs_genlock_features_colorkey;
static bool aga_genlock_features_zdclken;
uae_sem_t gui_sem;
static int rga_denise_fast_read, rga_denise_fast_write;
#define DENISE_RGA_SLOT_FAST_TOTAL 1024
static struct denise_rga rga_denise_fast[DENISE_RGA_SLOT_FAST_TOTAL];
typedef void (*LINETOSRC_FUNC)(void);
static LINETOSRC_FUNC lts;
static bool lts_changed, lts_request;
typedef void (*LINETOSRC_FUNCF)(int,int,int,int,int,int,int,int,int,uae_u32,uae_u8*,uae_u8*,int,int*,int,struct linestate*);
static int denise_hcounter, denise_hcounter_next, denise_hcounter_new, denise_hcounter_prev;
static uae_u32 bplxdat[MAX_PLANES], bplxdat2[MAX_PLANES], bplxdat3[MAX_PLANES];
static uae_u64 bplxdat_64[MAX_PLANES], bplxdat2_64[MAX_PLANES], bplxdat3_64[MAX_PLANES];
static uae_u16 bplcon0_denise, bplcon1_denise, bplcon2_denise, bplcon3_denise, bplcon4_denise;
static uae_u8 bplcon4_denise_xor_val, bplcon4_denise_sbase, bplcon4_denise_xor_val2;
static int bplcon1_shift[2], bplcon1_shift_full[2], bplcon1_shift_full_masked[2], bplshiftcnt[2];
static int bplcon1_shift_mask, bplcon1_shift_mask_full;
static int denise_res, denise_res_size;
static uae_u16 denise_diwstrt, denise_diwstop;
static int denise_hstrt, denise_hstop, denise_diwhigh, denise_diwhigh2;
static int denise_brdstrt, denise_brdstop;
static int denise_brdstrt_lores, denise_brdstop_lores;
static bool denise_brdstrt_unalign, denise_brdstop_unalign;
static int denise_hstrt_lores, denise_hstop_lores;
static bool denise_hstrt_unalign, denise_hstop_unalign, denise_phbstrt_unalign, denise_phbstop_unalign;
static int denise_hbstrt_lores, denise_hbstop_lores;
static int denise_strlong_lores, denise_strlong_hd;
static bool denise_strlong_unalign, strlong_emulation;
static int denise_phbstrt, denise_phbstop, denise_phbstrt_lores, denise_phbstop_lores;
static int linear_denise_vbstrt, linear_denise_vbstop;
static int linear_denise_hbstrt, linear_denise_hbstop;
static int denise_visible_lines, denise_visible_lines_counted;
static uae_u16 hbstrt_denise_reg, hbstop_denise_reg;
static uae_u16 fmode_denise, denise_bplfmode, denise_sprfmode;
static bool denise_sprfmode64, denise_bplfmode64;
static int bpldat_fmode;
static int fetchmode_size_denise, fetchmode_mask_denise;
static int delayed_vblank_ecs;
static bool denise_hdiw, denise_hblank, denise_phblank, denise_vblank, denise_pvblank;
static bool denise_blank_active, denise_blank_active2, denise_hblank_active, denise_vblank_active;
static bool debug_special_csync, debug_special_hvsync;
static bool exthblankon_ecs, exthblankon_ecsonly, exthblankon_aga;
static bool denise_csync, denise_vsync, denise_hsync, denise_blank_enabled;
static bool denise_csync_blanken, denise_csync_blanken2;
static bool diwhigh_written;
struct color_entry denise_colors;
static bool bpl1dat_trigger, bpl1dat_copy;
static uae_u32 bordercolor, bordercolor_ecs_shres;
static int sprites_hidden, sprites_hidden2, sprite_hidden_mask;
static bool bordersprite, borderblank, bordertrans;
static bool bpldat_copy[2];
static int denise_planes, denise_max_planes;
static bool denise_odd_even, denise_max_odd_even;
static int pix_prev;
static int last_bpl_pix;
static int previous_strobe;
static bool denise_strlong, denise_strlong_fast, agnus_lol, extblank;
static int lol, lol_fast;
static int denise_lol_shift_prev;
static bool denise_lol_shift_enable;
static int decode_specials, decode_specials_debug;
static int *dpf_lookup, *dpf_lookup_no;
static int denise_sprres, denise_spr_add, denise_spr_shiftsize;
static int denise_xposmask, denise_xposmask_lores, denise_xposmask_mask_lores;
static uae_u16 clxcon, clxcon2;
static int clxcon_bpl_enable_o, clxcon_bpl_match_o;
static int clxcon_bpl_enable, clxcon_bpl_match;
static uae_u16 clxcon_bpl_enable_55, clxcon_bpl_enable_aa;
static uae_u16 clxcon_bpl_match_55, clxcon_bpl_match_aa;
static int aga_delayed_color_idx;
static uae_u16 aga_delayed_color_val, aga_delayed_color_con2, aga_delayed_color_con3;
static int aga_unalign0, aga_unalign1, bpl1dat_unalign, reswitch_unalign;
static uae_u8 loaded_pix, loaded_pixs[4];
static int hresolution, hresolution_add;
static bool denise_sprite_blank_active;
static int delayed_sprite_vblank_ecs;
static bool denise_burst;
static int *debug_dma_dhpos_odd;
static struct dma_rec *debug_dma_ptr;
static int denise_cycle_half;
static int denise_vblank_extra_top, denise_vblank_extra_bottom;
static int denise_hblank_extra_left, denise_hblank_extra_right;
static uae_u32 dtbuf[2][4];
static uae_u8 dtgbuf[2][4];
struct denise_spr
{
int num;
uae_u16 pos, ctl;
uae_u32 dataa, datab;
uae_u64 dataa64, datab64;
int xpos, xpos_lores;
int armed, armeds;
uae_u32 dataas, databs;
uae_u64 dataas64, databs64;
bool attached;
bool shiftercopydone;
int fmode;
int shift;
int pix;
};
static struct denise_spr dspr[MAX_SPRITES];
static struct denise_spr *dprspt[MAX_SPRITES + 1], *dprspts[MAX_SPRITES + 1];
static int denise_spr_nr_armed, denise_spr_nr_armeds;
static uae_u16 bplcoltable[256];
static uae_u16 sprcoltable[256];
static uae_u16 sprbplcoltable[256];
static uae_u8 sprcolmask;
static int denise_spr_nearestcnt;
static int denise_y_start, denise_y_end;
static int denise_pixtotal, denise_pixtotalv, denise_linecnt, denise_startpos, denise_cck, denise_total;
static int denise_pixtotalskip, denise_pixtotalskip2, denise_hdelay;
static int denise_pixtotal_max;
static uae_u32 *buf1, *buf2, *buf_d;
static uae_u8 *gbuf, *gbuf_end;
static uae_u8 pixx0, pixx1, pixx2, pixx3;
static uae_u32 debug_buf[256 * 2 * 4], debug_bufx[256 * 2 * 4];
static int hbstrt_offset, hbstop_offset;
static int hstrt_offset, hstop_offset;
static int bpl1dat_trigger_offset;
static int internal_pixel_cnt, internal_pixel_start_cnt;
static bool no_denise_lol, denise_strlong_seen;
#define STRLONG_SEEN_DELAY 2
static int denise_strlong_seen_delay;
void set_inhibit_frame(int monid, int bit)
{
struct amigadisplay *ad = &adisplays[monid];
ad->inhibit_frame |= 1 << bit;
}
void clear_inhibit_frame(int monid, int bit)
{
struct amigadisplay *ad = &adisplays[monid];
ad->inhibit_frame &= ~(1 << bit);
}
void toggle_inhibit_frame(int monid, int bit)
{
struct amigadisplay *ad = &adisplays[monid];
ad->inhibit_frame ^= 1 << bit;
}
static void clearbuffer(struct vidbuffer *dst)
{
if (!dst->bufmem_allocated)
return;
uae_u8 *p = dst->bufmem_allocated;
for (int y = 0; y < dst->height_allocated; y++) {
memset (p, 0, dst->width_allocated * dst->pixbytes);
p += dst->rowbytes;
}
}
static void count_frame(int monid)
{
struct amigadisplay *ad = &adisplays[monid];
ad->framecnt++;
if (ad->framecnt >= currprefs.gfx_framerate || currprefs.monitoremu == MONITOREMU_A2024)
ad->framecnt = 0;
if (ad->inhibit_frame)
ad->framecnt = 1;
}
STATIC_INLINE int xshift (int x, int shift)
{
if (shift < 0)
return x >> (-shift);
else
return x << shift;
}
int coord_native_to_amiga_x (int x)
{
x += visible_left_border;
return x;
}
int coord_native_to_amiga_y (int y)
{
if (!native2amiga_line_map || y < 0 || y >= native2amiga_line_map_height)
return -1;
return native2amiga_line_map[y] + thisframe_y_adjust - minfirstline;
}
void notice_screen_contents_lost(int monid)
{
struct amigadisplay *ad = &adisplays[monid];
ad->picasso_redraw_necessary = 1;
ad->frame_redraw_necessary = 2;
}
bool isnativevidbuf(int monid)
{
struct vidbuf_description *vidinfo = &adisplays[monid].gfxvidinfo;
if (vidinfo->outbuffer == NULL)
return false;
if (vidinfo->outbuffer == vidinfo->inbuffer)
return true;
return !vidinfo->outbuffer->hardwiredpositioning;
}
extern int plffirstline_total, plflastline_total;
extern int diwfirstword_total, diwlastword_total;
extern int ddffirstword_total, ddflastword_total;
extern bool vertical_changed, horizontal_changed;
extern int firstword_bplcon1;
extern bool lof_display;
#define MIN_DISPLAY_W 256
#define MIN_DISPLAY_H 192
#define MAX_DISPLAY_W 362
#define MAX_DISPLAY_H 283
static int gclow, gcloh, gclox, gcloy, gclorealh;
static int stored_left_start, stored_top_start, stored_width, stored_height;
void get_custom_topedge (int *xp, int *yp, bool max)
{
if (isnativevidbuf(0) && !max) {
int x = visible_left_border;
int y = minfirstline << currprefs.gfx_vresolution;
#if 0
int dbl1, dbl2;
dbl2 = dbl1 = currprefs.gfx_vresolution;
if (doublescan > 0 && interlace_seen <= 0) {
dbl1--;
dbl2--;
}
x = -(visible_left_border + (DISPLAY_LEFT_SHIFT << currprefs.gfx_resolution));
y = -minfirstline << currprefs.gfx_vresolution;
y = xshift (y, dbl2);
#endif
*xp = x;
*yp = y;
} else {
*xp = 0;
*yp = 0;
}
}
static void reset_custom_limits(void)
{
gclow = gcloh = gclox = gcloy = 0;
gclorealh = -1;
center_reset = 1;
}
int get_vertical_visible_height(bool useoldsize)
{
struct vidbuf_description *vidinfo = &adisplays[0].gfxvidinfo;
int h = vidinfo->inbuffer->inheight;
if (programmedmode <= 1) {
h = maxvsize_display;
if (useoldsize) {
// 288/576 or 243/486
if (h == 288 || h == 243) {
h--;
}
}
if (currprefs.gfx_overscanmode >= OVERSCANMODE_BROADCAST) {
h += 2;
}
h <<= currprefs.gfx_vresolution;
if (h > vidinfo->inbuffer->inheight) {
h = vidinfo->inbuffer->inheight;
}
}
if (interlace_seen && currprefs.gfx_vresolution > 0) {
h -= 1 << (currprefs.gfx_vresolution - 1);
}
if (!syncdebug) {
bool hardwired = true;
if (ecs_agnus) {
hardwired = (new_beamcon0 & BEAMCON0_VARVBEN) == 0;
}
if (hardwired) {
int hh = denise_visible_lines_counted;
if (currprefs.gfx_overscanmode >= OVERSCANMODE_BROADCAST) {
hh += 2;
}
hh <<= currprefs.gfx_vresolution;
if (h > hh) {
h = hh;
}
}
}
return h;
}
void get_custom_raw_limits(int *pw, int *ph, int *pdx, int *pdy)
{
if (stored_width > 0) {
*pw = stored_width;
*ph = stored_height;
*pdx = stored_left_start;
*pdy = stored_top_start;
} else {
int x = visible_left_border;
if (x < visible_left_start)
x = visible_left_start;
*pdx = x;
int x2 = visible_right_border;
if (x2 > visible_right_stop)
x2 = visible_right_stop;
*pw = x2 - x;
int y = min_ypos_for_screen;
if (y < visible_top_start)
y = visible_top_start;
*pdy = y;
int y2 = max_ypos_thisframe1;
if (y2 > visible_bottom_stop)
y2 = visible_bottom_stop;
*ph = y2 - y;
}
}
void check_custom_limits(void)
{
struct amigadisplay *ad = &adisplays[0];
struct gfx_filterdata *fd = &currprefs.gf[ad->gf_index];
int vls = visible_left_start;
int vrs = visible_right_stop;
int vts = visible_top_start;
int vbs = visible_bottom_stop;
int left = fd->gfx_filter_left_border < 0 ? 0 : fd->gfx_filter_left_border >> (RES_MAX - currprefs.gfx_resolution);
int right = fd->gfx_filter_right_border < 0 ? 0 : fd->gfx_filter_right_border >> (RES_MAX - currprefs.gfx_resolution);
int top = fd->gfx_filter_top_border < 0 ? 0 : fd->gfx_filter_top_border;
int bottom = fd->gfx_filter_bottom_border < 0 ? 0 : fd->gfx_filter_bottom_border;
denise_vblank_extra_top = -1;
denise_vblank_extra_bottom = 30000;
if (left > 0) {
left += (0x38 * 4) >> (RES_MAX - currprefs.gfx_resolution);
}
if (right > 0) {
right += (0x38 * 4) >> (RES_MAX - currprefs.gfx_resolution);
}
if (left > visible_left_start) {
visible_left_start = left;
}
if (right > left && right < visible_right_stop) {
visible_right_stop = right;
}
if (top > visible_top_start) {
visible_top_start = top;
}
if (bottom > top && bottom < visible_bottom_stop) {
visible_bottom_stop = bottom;
}
int vshift = currprefs.gfx_vresolution;
if (doublescan == 1 && vshift > 0) {
vshift--;
}
denise_vblank_extra_top = ((visible_top_start - 1) >> vshift) - 1;
denise_vblank_extra_bottom = ((visible_bottom_stop + 1) >> vshift) + 1;
denise_hblank_extra_left = visible_left_start - (1 << currprefs.gfx_resolution);
denise_hblank_extra_right = visible_right_stop + (1 << currprefs.gfx_resolution);
//write_log("%d %d %d %d\n", denise_vblank_extra_top, denise_vblank_extra_bottom, visible_top_start, visible_bottom_stop);
}
void set_custom_limits (int w, int h, int dx, int dy, bool blank)
{
struct amigadisplay *ad = &adisplays[0];
struct gfx_filterdata *fd = &currprefs.gf[ad->gf_index];
struct vidbuf_description *vidinfo = &adisplays[0].gfxvidinfo;
struct vidbuffer *vb = vidinfo->inbuffer;
if (fd->gfx_filter_left_border == 0) {
w = 0;
dx = 0;
}
if (fd->gfx_filter_top_border == 0) {
h = 0;
dy = 0;
}
#ifdef WITH_SPECIALMONITORS
if (specialmonitor_uses_control_lines() || !blank) {
w = -1;
h = -1;
}
#endif
int hwadd = 0;
int vwadd = 0;
if (currprefs.gfx_overscanmode < OVERSCANMODE_OVERSCAN) {
int wadd = (OVERSCANMODE_OVERSCAN - currprefs.gfx_overscanmode) * 8;
if (currprefs.gfx_overscanmode == 0) {
wadd -= 6;
}
hwadd = wadd << hresolution;
vwadd = ((wadd - (vsync_startline + 1)) << currprefs.gfx_vresolution);
}
int vshift = currprefs.gfx_vresolution;
if (doublescan == 1) {
vshift--;
}
if (vshift < 0) {
vshift = 0;
}
if (w <= 0 || dx < 0) {
visible_left_start = 0;
visible_right_stop = MAX_STOP;
} else {
if (dx < hwadd) {
w -= 2 * (hwadd - dx);
dx = hwadd;
}
visible_left_start = visible_left_border + dx;
visible_right_stop = visible_left_start + w;
if (currprefs.gfx_overscanmode >= OVERSCANMODE_BROADCAST) {
visible_right_stop += 2 << currprefs.gfx_resolution;
}
}
if (h <= 0 || dy < 0) {
visible_top_start = 0;
visible_bottom_stop = MAX_STOP;
} else {
int startypos = min_ypos_for_screen;
visible_top_start = startypos + dy;
visible_bottom_stop = startypos + dy + h;
if (currprefs.gfx_overscanmode >= OVERSCANMODE_BROADCAST) {
visible_top_start -= 1 << currprefs.gfx_resolution;
visible_bottom_stop += 1 << currprefs.gfx_resolution;
}
if (visible_top_start < vwadd + startypos) {
visible_top_start = vwadd + startypos;
}
if ((current_linear_vpos << currprefs.gfx_vresolution) - vwadd < visible_bottom_stop) {
visible_bottom_stop = (current_linear_vpos << currprefs.gfx_vresolution) - vwadd;
}
}
check_custom_limits();
}
void store_custom_limits(int w, int h, int x, int y)
{
stored_left_start = x;
stored_top_start = y;
stored_width = w;
stored_height = h;
#if 0
write_log (_T("%dx%d %dx%d %dx%d %dx%d %d\n"), x, y, w, h,
currprefs.gfx_xcenter_pos,
currprefs.gfx_ycenter_pos,
currprefs.gfx_xcenter_size,
currprefs.gfx_ycenter_size,
currprefs.gfx_filter_autoscale);
#endif
}
int get_custom_limits(int *pw, int *ph, int *pdx, int *pdy, int *prealh, int *hres, int *vres)
{
struct vidbuf_description *vidinfo = &adisplays[0].gfxvidinfo;
int w, h, dx, dy, y1, y2, dbl1, dbl2;
int ret = 0;
if (!pw || !ph || !pdx || !pdy) {
reset_custom_limits();
return 0;
}
*hres = hresolution;
*vres = currprefs.gfx_vresolution;
if (!isnativevidbuf(0)) {
*pw = vidinfo->inbuffer->outwidth;
*ph = vidinfo->inbuffer->outheight;
*pdx = 0;
*pdy = 0;
*prealh = -1;
return 1;
}
*pw = gclow;
*ph = gcloh;
*pdx = gclox;
*pdy = gcloy;
*prealh = gclorealh;
if (gclow > 0 && gcloh > 0)
ret = -1;
if (interlace_seen) {
static int interlace_count;
// interlace = only use long frames
if (lof_display && (interlace_count & 1) == 0)
interlace_count++;
if (!lof_display && (interlace_count & 1) != 0)
interlace_count++;
if (interlace_count < 3)
return ret;
if (!lof_display)
return ret;
interlace_count = 0;
}
int skip = denise_hdelay << (RES_MAX + 1);
int diwfirst = diwfirstword_total + skip;
int diwlast = diwlastword_total + skip;
int ddffirst = ddffirstword_total << (RES_MAX + 1);
int ddflast = ddflastword_total << (RES_MAX + 1);
if (doublescan <= 0 && !programmedmode) {
int min = 92 << RES_MAX;
int max = 460 << RES_MAX;
if (diwfirst < min)
diwfirst = min;
if (diwlast > max)
diwlast = max;
if (ddffirstword_total < 30000) {
if (ddffirst < min)
ddffirst = min;
if (ddflast > max)
ddflast = max;
if (0 && !aga_mode) {
if (ddffirst > diwfirst)
diwfirst = ddffirst;
if (ddflast < diwlast)
diwlast = ddflast;
}
}
}
w = diwlast - diwfirst;
dx = diwfirst - (hdisplay_left_border << (RES_MAX + 1)) + (1 << RES_MAX);
w >>= (RES_MAX - hresolution);
dx >>= (RES_MAX - hresolution);
y2 = plflastline_total;
y1 = plffirstline_total;
if (exthblankon_ecs) {
y1--;
}
if (minfirstline_linear > y1) {
y1 = minfirstline_linear;
}
dbl2 = dbl1 = currprefs.gfx_vresolution;
if (doublescan > 0 && interlace_seen <= 0) {
dbl1--;
dbl2--;
}
h = y2 - y1 + 1;
dy = y1 - minfirstline_linear;
if (plffirstline_total >= 30000) {
// no planes enabled during frame
if (ret < 0)
return 1;
h = currprefs.ntscmode ? 200 : 240;
w = 320 << hresolution;
dy = 36 / 2;
dx = 58;
}
if (dx < 0)
dx = 0;
*prealh = -1;
if (programmedmode != 1 && plffirstline_total < 30000) {
int th = (current_linear_vpos - minfirstline_linear) * 95 / 100;
if (th > h) {
th = xshift(th, dbl1);
*prealh = th;
}
}
dy = xshift(dy, dbl2);
h = xshift(h, dbl1);
if (w == 0 || h == 0)
return 0;
#if 1
if (doublescan <= 0 && programmedmode != 1) {
if ((w >> currprefs.gfx_resolution) < MIN_DISPLAY_W) {
dx += (w - (MIN_DISPLAY_W << currprefs.gfx_resolution)) / 2;
w = MIN_DISPLAY_W << currprefs.gfx_resolution;
}
if ((h >> dbl1) < MIN_DISPLAY_H) {
dy += (h - (MIN_DISPLAY_H << dbl1)) / 2;
h = MIN_DISPLAY_H << dbl1;
}
if ((w >> currprefs.gfx_resolution) > MAX_DISPLAY_W) {
dx += (w - (MAX_DISPLAY_W << currprefs.gfx_resolution)) / 2;
w = MAX_DISPLAY_W << currprefs.gfx_resolution;
}
if ((h >> dbl1) > MAX_DISPLAY_H) {
dy += (h - (MAX_DISPLAY_H << dbl1)) / 2;
h = MAX_DISPLAY_H << dbl1;
}
}
#endif
if (gclow == w && gcloh == h && gclox == dx && gcloy == dy)
return ret;
if (w <= 0 || h <= 0 || dx < 0 || dy < 0)
return ret;
if (doublescan <= 0 && programmedmode != 1) {
if (dx > vidinfo->inbuffer->inwidth / 2)
return ret;
if (dy > vidinfo->inbuffer->inheight / 2)
return ret;
}